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Multi-lug type butterfly valve flange expansion tool

A butterfly valve flange and expansion tool technology, which is used in hand-held tools, manufacturing tools, etc., can solve the problems of difficult fixing of chain hoists, instability of hydraulic jacks, low working efficiency, etc., to achieve reliable positioning, avoid valve damage, and operate handy effect

Pending Publication Date: 2019-04-05
SANMEN NUCLEAR POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is time-consuming and labor-intensive, it is difficult to fix the chain hoist, the work efficiency is not high, and there is a safety risk of hydraulic jack instability due to unbalanced force

Method used

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  • Multi-lug type butterfly valve flange expansion tool
  • Multi-lug type butterfly valve flange expansion tool
  • Multi-lug type butterfly valve flange expansion tool

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0020] The following are specific embodiments of the present invention and in conjunction with the accompanying drawings, the technical solutions of the present invention are further described, but the present invention is not limited to these embodiments.

[0021] Such as figure 1 , 3 , A multi-ear butterfly valve flange expansion tool of the present invention includes a first fixing block 1 , a second fixing block 2 , a screw rod 3 , and one or two expansion nuts 4 . The first fixed block 1 is processed with a light hole, and the second fixed block 2 is processed with a screw hole, and the screw 3 passes through the light hole of the first fixed block and passes through the second fixed block 2 The screw holes of the first fixed block 1 and the second fixed block 2 are connected. One or two expansion nuts 4 are sleeved on the screw rod 3 and located between the first fixing block 1 and the second fixing block 2 . The screw 3 includes a head end and a threaded rod-shaped p...

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Abstract

The invention discloses a multi-lug type butterfly valve flange expansion tool, and belongs to the technical field of maintenance of pipeline valves of nuclear power plants. The tool comprises a firstfixing block and a second fixing block which are clamped on two flanges of a butterfly valve respectively, a screw rod and one or two expansion nuts; an unthreaded hole is formed in the first fixingblock, and a screw hole is formed in the second fixing block; the screw rod penetrates through the unthreaded hole of the first fixing block, then penetrates through the one or two expansion nuts, then penetrates through the screw hole of the second fixing block, so that the first fixing block and the second fixing block are connected together; and the head end of the screw rod is arranged on oneside of the first fixing block. According to the tool, disassembly and installation work of the multi-lug butterfly valve can be rapidly completed. The tool is simple in structure, small in weight, convenient to transport, simple to mount and dismount, reliable in positioning and convenient to operate. Meanwhile, the risk that the valve is damaged due to unstable clamping of a pipeline is avoided,and the on-site working efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of inspection and maintenance of pipeline valves in nuclear power plants, and in particular relates to a multi-ear butterfly valve flange expansion tool. Background technique [0002] When checking the cleanliness of the pipes at both ends of the multi-ear butterfly valve in the circulating water pump room, it is necessary to take out the multi-ear connection butterfly valve for inspection. During the disassembly and installation process, the flange needs to be expanded to facilitate the removal or installation of the butterfly valve. But in the specific operation, after removing the flange screws and loosening all the fixing hoops on the left and right sides of the pipeline, the extrusion of the butterfly valve by the pipeline is still too tight, making it impossible to remove the butterfly valve smoothly. In the end, tools such as chain hoists and hydraulic jacks were used in the work to separate the flang...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B25B27/02
CPCB25B27/02
Inventor 王俊李涛金飞韩杰焦守超阮杭浙裴学强谭进廖明蒋文结甘万忺夏崧浩孙正旭
Owner SANMEN NUCLEAR POWER CO LTD
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